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  1.  3
    Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen.Siegfried Gottwald - 1989 - De Gruyter.
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  2.  31
    Mathematical Fuzzy Logics.Siegfried Gottwald - 2008 - Bulletin of Symbolic Logic 14 (2):210-239.
    The last decade has seen an enormous development in infinite-valued systems and in particular in such systems which have become known as mathematical fuzzy logics. The paper discusses the mathematical background for the interest in such systems of mathematical fuzzy logics, as well as the most important ones of them. It concentrates on the propositional cases, and mentions the first-order systems more superficially. The main ideas, however, become clear already in this restricted setting.
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  3.  25
    Universes of Fuzzy Sets and Axiomatizations of Fuzzy Set Theory. Part I: Model-Based and Axiomatic Approaches.Siegfried Gottwald - 2006 - Studia Logica 82 (2):211-244.
    For classical sets one has with the cumulative hierarchy of sets, with axiomatizations like the system ZF, and with the category SET of all sets and mappings standard approaches toward global universes of all sets. We discuss here the corresponding situation for fuzzy set theory.Our emphasis will be on various approaches toward (more or less naively formed)universes of fuzzy sets as well as on axiomatizations, and on categories of fuzzy sets.
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  4.  11
    Many-Valued Logic.Siegfried Gottwald - 2008 - Stanford Encyclopedia of Philosophy.
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  5.  27
    Universes of Fuzzy Sets and Axiomatizations of Fuzzy Set Theory. Part II: Category Theoretic Approaches.Siegfried Gottwald - 2006 - Studia Logica 84 (1):23-50.
    For classical sets one has with the cumulative hierarchy of sets, with axiomatizations like the system ZF, and with the category SET of all sets and mappings standard approaches toward global universes of all sets.We discuss here the corresponding situation for fuzzy set theory. Our emphasis will be on various approaches toward (more or less naively formed) universes of fuzzy sets as well as on axiomatizations, and on categories of fuzzy sets.
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  6.  16
    Zahlbereichskonstruktionen in einer Mehrwertigen Mengenlehre.Siegfried Gottwald - 1971 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 17 (1):145-188.
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  7.  15
    Verallgemeinerte Peano-Systeme.Siegfried Gottwald - 1972 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 18 (1-3):19-30.
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  8.  13
    T-Norms and Φ-Operators as Truth Functions of Many Valued Connectives.Siegfried Gottwald - 1984 - Bulletin of the Section of Logic 13 (2):55-58.
    The choice of connectives for many valued propositional logics suitable for theoretical and applicational interests in most cases is an open problem up to now. We will not offer a general solution here, but support the point of view of some recent developments in fuzzy set theory that the triangular norms – t-norms for short – of Schweizer/Sklar [3] and the ϕ-operators of Pedrycz [2] represent quite general classes of connectives at least for many valued logics with truth value set (...)
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  9.  2
    Verallgemeinerte Peano‐Systeme.Siegfried Gottwald - 1972 - Mathematical Logic Quarterly 18 (1‐3):19-30.
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  10.  1
    Zahlbereichskonstruktionen in einer Mehrwertigen Mengenlehre.Siegfried Gottwald - 1971 - Mathematical Logic Quarterly 17 (1):145-188.
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    2. Mehrwertige Aussagenlogik.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 12-83.
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  12. 5. Anwendungen der mehrwertigen Logik.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 251-345.
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  13. 1. Einleitung.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 1-11.
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  14. Fuzzy-Logik und approximatives Schließen - ein kurzer Überblick.Siegfried Gottwald - 1997 - In Julian Nida-Rümelin & Georg Meggle (eds.), Analyomen 2, Volume I: Logic, Epistemology, Philosophy of Science. De Gruyter. pp. 78-86.
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  15. Inhaltsverzeichnis.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter.
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  16. Literaturverzeichnis.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 346-365.
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  17. 4. Mehrwertige Prädikatenlogik.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 183-250.
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  18. Namenverzeichnis.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 369-372.
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  19. Symbolverzeichnis.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 366-368.
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  20. Sachverzeichnis.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 373-378.
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  21. 3. Spezielle Systeme Mehrwertiger Aussagenlogik.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter. pp. 84-182.
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  22. Vorwort.Siegfried Gottwald - 1989 - In Mehrwertige Logik: Eine Einführung in Theorie Und Anwendungen. De Gruyter.
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